netdev - Re: [PATCH V4 1/4] vDPA/ifcvf: implement IO read/write helpers in the header file

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Date:   Mon, 14 Feb 2022 14:15:58 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Zhu Lingshan <lingshan.zhu@...el.com>, mst@...hat.com
Cc:     netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH V4 1/4] vDPA/ifcvf: implement IO read/write helpers in the
 header file


在 2022/2/3 下午3:27, Zhu Lingshan 写道:
> re-implement IO read/write helpers in the header file, so that
> they can be utilized among modules.
>
> Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>


I wonder if we can simply use include/linux/virtio_pci_modern.h.

The accessors vp_ioreadX/writeX() there were decoupled from the 
virtio_pci_modern_device structure.

Thanks


> ---
>   drivers/vdpa/ifcvf/ifcvf_base.c | 36 --------------------------------
>   drivers/vdpa/ifcvf/ifcvf_base.h | 37 +++++++++++++++++++++++++++++++++
>   2 files changed, 37 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
> index 7d41dfe48ade..397692ae671c 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_base.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_base.c
> @@ -10,42 +10,6 @@
>   
>   #include "ifcvf_base.h"
>   
> -static inline u8 ifc_ioread8(u8 __iomem *addr)
> -{
> -	return ioread8(addr);
> -}
> -static inline u16 ifc_ioread16 (__le16 __iomem *addr)
> -{
> -	return ioread16(addr);
> -}
> -
> -static inline u32 ifc_ioread32(__le32 __iomem *addr)
> -{
> -	return ioread32(addr);
> -}
> -
> -static inline void ifc_iowrite8(u8 value, u8 __iomem *addr)
> -{
> -	iowrite8(value, addr);
> -}
> -
> -static inline void ifc_iowrite16(u16 value, __le16 __iomem *addr)
> -{
> -	iowrite16(value, addr);
> -}
> -
> -static inline void ifc_iowrite32(u32 value, __le32 __iomem *addr)
> -{
> -	iowrite32(value, addr);
> -}
> -
> -static void ifc_iowrite64_twopart(u64 val,
> -				  __le32 __iomem *lo, __le32 __iomem *hi)
> -{
> -	ifc_iowrite32((u32)val, lo);
> -	ifc_iowrite32(val >> 32, hi);
> -}
> -
>   struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw)
>   {
>   	return container_of(hw, struct ifcvf_adapter, vf);
> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
> index c486873f370a..949b4fb9d554 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_base.h
> +++ b/drivers/vdpa/ifcvf/ifcvf_base.h
> @@ -42,6 +42,43 @@
>   #define ifcvf_private_to_vf(adapter) \
>   	(&((struct ifcvf_adapter *)adapter)->vf)
>   
> +static inline u8 ifc_ioread8(u8 __iomem *addr)
> +{
> +	return ioread8(addr);
> +}
> +
> +static inline u16 ifc_ioread16(__le16 __iomem *addr)
> +{
> +	return ioread16(addr);
> +}
> +
> +static inline u32 ifc_ioread32(__le32 __iomem *addr)
> +{
> +	return ioread32(addr);
> +}
> +
> +static inline void ifc_iowrite8(u8 value, u8 __iomem *addr)
> +{
> +	iowrite8(value, addr);
> +}
> +
> +static inline void ifc_iowrite16(u16 value, __le16 __iomem *addr)
> +{
> +	iowrite16(value, addr);
> +}
> +
> +static inline void ifc_iowrite32(u32 value, __le32 __iomem *addr)
> +{
> +	iowrite32(value, addr);
> +}
> +
> +static inline void ifc_iowrite64_twopart(u64 val,
> +				  __le32 __iomem *lo, __le32 __iomem *hi)
> +{
> +	ifc_iowrite32((u32)val, lo);
> +	ifc_iowrite32(val >> 32, hi);
> +}
> +
>   struct vring_info {
>   	u64 desc;
>   	u64 avail;